Polishing-machine



(No Model.) I

I J. B. BENNETT 86 A. P. BOARD POLISHING MACHINE.

Patented Dee. Z,- 1890.

4 Sheets-Sheet 1'. MAN.

' 4 Sheets-Sheet 2.

J. B. BENNETT & A. P. BOARDMAN. POLISHING MACHINE.

No. 441,634. Patented Dec. 2, 1890.

(No Model.)

(NoModeli) 4 Sheets-Sheet 3. J. B. BENNETT 8a 'A. P. BOARD'MAN. POLISHING MACHINE.

"N0. 441,634. Patented 1390.2, 1890.

@xwvwwwz I I awn 60m.

(No Model.) v '4 Sheets-Sheet 4.

r J. B. BENNETTJfiu A. P BOARDMAN.

POLISHING MACHINE,

Patented Dec. 2,1890.

I UNITED STATES PATENT OFFICE.

JOSEPH B. BENNETT AND ANSON P. BOARDMAN, OF \VATERTOIVN, ASSIGN OBS, BY MESNE ASSIGNMENTS, TO THE BERLIN MACHINE FORKS, OF-

BELOIT, WISCONSIN.

POLISHING-MACHINE.

V SPECIFICATION forming part of Letters Patent No. 441,634, dated December 2, 1890.

Application filed'April 22, 1889. Serial No. 308,205. (No model.)

To all whom it may concern.-

Beit known that we, JOSEPH B. BENNETT and ANSON P. BOARDMAN, of Watertown, in the county of Jefferson and State of Wisconsin,

have invented new and useful Improvements in Polishing-Machines; and we do hereby declare the following to be a full, clear, and

exact description of said invention, reference being had to the accompanying drawings, and

To to the letters or figures of reference marked thereon, which form a part of this specification.

' Our invention is in certain novel features introduced into that class of polishing-ma x 5 chines in which sandpaper-covered cylinders are used in connection with a reciprocating flat-topped polisher. v

In the drawings, Figure 1' is a side elevation of our improved machine, a part being broken away to show interior parts. Fig. 2 is I a detail of a device for supporting yieldingly the bearings of, the upper feed-rolls. Fig. 3 is a top View of the nut used with the device shown in Fig. 2. Fig. 4 is an elevation I of the side of our machine opposite to the side shown in Fig. 1. Fig. 5 is a vertical section longitudinally of themachine made just inside of the side frame, as shown in Fig. 4, some parts being removed and others broken away to show other interior parts. Fig. 6 is a vertical transverse section of our machine on line X X of Fig. 4, looking toward the left. Fig. 7 is aview from beneathof the flat-topped polisher and its supporting and operating mechanism. Fig. 8 is a deta l, part in section, of the device for raising and lowering the sandpaper-covered cylinders. Fig. 9 is a plan, part in section, of the same device shown in Fig. 8. Fig. 10 is a detail of the worm gear used for operating eccentrics, l adapted for raising and lowering the cylinders'and flat-topped polisher. Fig. 11 is a detail of 'the'device for raising and lowering the lower feed-rolls. Fig. 12 is a side view of the device'for adjusting the bearings of the eccentrics used for raising and lowering the eylinder'sandfiattopped polisher; Fig. 13, a View"illustrating-the mechanism for moving the polisher. I r Y Thesame letters and figures refer to like; parts in all the views. a

A is the main frame. fv 1 g B is the top or presser frame located difrectly above the main frame. I

In the sides of the main frame there are; formed wells 0 0, each provided witha lug F, projecting inwardly from the side wall of the well.

The pressenframe B is provided with rigid downwardly-extending guide-legs D, which enter the wells 0 and are adapted to travel Vertically therein. Screw-threaded adjust: ing-bolts E E, having bearings and rotary motion, but not endwise motion, in the presser frame B, extend downwardly into the wells" 0 O, turning bya screw-thread in, the lugs F, whereby the presser-frame is raised and lowered. The bolts E E are provided with beveled pinions G, G, which mesh with beveled pinions on the ends of the shaftsI-I H, which shafts havethcir'bearings in brackets on theframe B,the shafts being adapted to be rotated by the crank Ion the end of one ofthe shafts. v I v A removable-table 0n the top of the main frame A forms-the sand-guard K, which is.

. provided with transverse slots L L, into and partially through which the sand-cylinders and the flat-topped polisher project. The sand-cylinders l 1 are supported on shafts 2- 8o 2, which have their bearings in movable blocks in the frame A, in, which the shafts I have endwiseIas well as rotary movement. The shafts of the cylinders are each provided" witha fixed band-wheel 3 3, on which the bands 4 4 and 4 run, which also run on pulleys on the power supplying shaft. We have found it desirable to reverse the motion of one of the sand-cylinders, and to accomplish that it will be noticed that the bands 4 4 are open direct-running bands while the band 4'- is crossed, thereby reversing the rotary movement of the last of the three cylinders 1 l 1. Ive also provide for an endwise orvibratory I movement of the cylinders by means of cranks 5 5 5 5, pivoted at their angles on the frame A, each carrying in its upperarm a movable collar 6, which rides on the shaft 2 between fixed;

collars 7 7 thereon, the lower arm of the crank being bifurcate and adapted to ride on an eccentric on shaft 8, whereby as the shaft is rotated the crank is tilted and the cylinders are reciprocated. The details of the construction of this crank and its connection with the shaft of the cylinder and with the eccentric driving-shaft we omit to show in greater detail in this application, as that device is fully shown in our recent application, N 0. 306,667, filed April 10, 1889, for a patentthereon. The shaft 8 is provided at one end with a pinion meshing on the transverse shaft 9,- which is driven by power communicated thereto through a band-wheel thereon. A flat-top burnisher 10 is located in the rear of the cylinders 1 1. This flat-top polisher is supported in ways on a frame 11, in which it has a reciprocal or vibratory motion laterally-that is, toward front and rear of the machine. To secure this movement, two blocks 12 12 are secured in ways in the under side of the polisher and are so constructed as to have movement endwise of the fiat-topped polisher therein, but not sidewise of the fiat-topped polisher. A wrist-pin 13 011 each of the crankwheels 14 14 enters the block 12 loosely, and as the crank-wheel 14 is rotated the fiat-topped polisher is reciprocated laterally. The crankwheels 14 14 are each provided with a spindle 15, which enters the short hollow shaft 16, the Spindle being provided with a longitudinal recess and the shaft 16 with a corresponding feather, whereby the spindle is compelled to rotate with the shaft 16. The shaft 16 is supported and rotates in bearings. formed thereabout with Babbitt metal in a cross-bar 15, rigid to the frame A. The shafts 16 16 are provided with pinions at their lower ends meshing with pinions on a shaft 17, which shaft 17 has a pinion at its end meshing with a pinion on shaft 8, whereby the shaft 17 is r0 tated and the flat-topped polisher is given its vibratory motion. The shafts 2 2 have their bearings in the tops of vertically-slidin g blocks 18 18, the ways for which blocks are on frame A, the way 19 on one side of the block being rigid to the frame and the way 20 011 the other side of the block being adjustable, it being secured movably to the frame by means of headed bolts 21 21, passing through slots in the frame and turning into the way 20, the movable way 20 being adjusted toward the block 18 by means of the bevel-headed bolts 22 22, bearing thereagainst and being secured to the frame by nuts turning thereon on the outside of the frame. A shaft 23, passing through apertures therefor in the frame,

has its bearings at each end in a lever 24,

pivoted on the frame. The body of this shaft 23 inside the frame is eccentric to its journals. The eccentric part of this shaft 23 passes through the blocks 25 25, which are movable laterally in ways therefor on the blocks 18 18, whereby as the shaft 23 is rotated limitedly the blocks 18 18 are elevated or depressed. These shafts 23 are each provided with a pinion 26, meshing with a worm-whee1 27 on a crank-rod 28, adapted to be rotated by means of ahand-whee129. By means of these hand-wheels and through the mechanism just described the sand-cylinders can be raised and lowered to a limited extent, as desired. This movement of the sand-cylinders is very necessary in order to lower them away from the sand-guard to regulate the amount of the cut on the material and for convenience in removing and replacing the sand-paper covering of the cylinders. A similar eccentric 23 and operated by similar mechanism passes through the lower part of the frame 11, in which the flat-topped polisher is supported, whereby the frame 11 is raised or depressed to a limited extent in the same manner. as the cylinders are elevated and depressed. The lever 24, in which the eccentrics 23 23 have their journal-bearings, is pivoted at one end to the frame and at the other end is provided with a slot 30, through which a headed bolt 31 passes, which is rigidly secured to the frame, whereby a movement up and down is permitted in the free end of the lever 24. A screw-threaded"bolt 32, turning in a bracket 33 on the frame, which bolt bears against the lower edge of thedfree end of the lever 24, is adapted to raise the lever, and screwthreaded bolt 34, turning through abracket 35 rigid on the frame, bears against the upper edge of the lever 24 and is adapted to depress the lever and prevent any slight movement upward, thus prohibiting any shaking or trembling of the levers 24, in which are the bearings of the eccentrics which support the cylinders.

By means of the adjustment permitted through the levers 24 the cylinders and bur, nishers may be aligned, and by means of the eccentrics 23 23 and 23 the several cylinders and the flat-topped polisher may be independently raised and lowered without detriment to or change of the alignment. At each end of the machine and between the cylinders, and between the cylinderand fiat-topped polisher, is a series of feed-rolls 36 36, each of which has its journal-bearings in movable blocks 37 37 in vertical ways in the frame A. These blocks are made adjustable by means of a supporting-bolt 38, turning through a part of the frame A. The head of the bolt 38 is inserted in a socket 39 therefor in the under side of the block 37. This bolt 38 is fixed in position by means of a set-screw 40, turning through a part of the frame against the bolt. By means of these bolts and the movable bearing-blocks 37 37 the feed-rolls may be ad justed up or down, as desired. These feedrolls are each provided with a cog-wheel 41 and intermediate between these cog-wheels are idle cog-wheels 42 42, whereby motion is communicated from one feed-roll to another, all being driven by a cog-wheel 43, meshing with one of the cog-wheels 41,.which cog-wheel 43 is on a shaft driven by power supplied by the power-supplying mechanism. A series of swinging arms 65.

Opposing feed-rolls 44 44 is located in the pressure-frame B, one roll being located immediately over each of the rolls in the frame below, which feed-rolls are provided with cogwheels 46 46. Between the feed-rolls are idlerolls 45 45, and opposite the idle-rolls are idlewheels 46' 46, journaled on the frame, and all these wheels mesh with each other, communicating motion from one to the other, the train being driven by a swinging cog-wheel 47, which is geared to the power-supplying mechanism. The journals of the feed-rolls 44 and idle-rolls 45 each has its bearing in a block 48, having vertical movement in ways in the pressure-frame. These blocks 48 are each supported by a hollow bolt 49, passing through an aperture therefor in the frameB above the block 48, into which block it turns by a screwthread, the bolt being provided with a nut 50, which turns on its outer end and rests on the frame, as shown in Fig. 2. This nut 50 has a saw-cut 51 across its top and down into it about half its height, whereby when the nut has been adjusted to place it can be bent and pinched together against the bolt, whereby it becomes rigid in position 011 the bolt. This nut is about twice as thick as the ordinary nut used for such purposes, which thickness is required to provide sufficient length for pinching the upper parts together, as shown in Fig. 2. A coiled-wire spring 52 is inserted around the bolt 49 between the top of the block 48 and the under surface of the frame B, whereby the journal is held yieldingly downward to its work. The flat-topped polisher 10 has a bed-piece 53 and a cap 54 as long as the bed-piece and somewhat wider. Over this cap 54 is placed a lining of felt or cloth, and over this a cover of sand-paper 55 or other polishing material.

A more specific description of the polisher in this application is not deemed necessary, as a separate application, Serial No. 317,329, for a patent on the polisher has been made by us, in which the polisher is fully described and its method of operation is set forth.

Above the flat-topped polisher is a presserbar 64, supported yieldingly in vertical ways in swinging arms 65 65 at each side of the machine, pivoted in the frame B. The presser-bar 64 presentsa fiat surface downwardly opposite to the flat topped polisher, and is provided with upwardly-turned ends 66 66, which serves as guides traveling in the ways in the This presser-bar is supported and held yieldingly to its work in the swinging arms by means of bolts, nuts, and springs, which are a counterpart of the bolt 49, nut 50, and spring. 52, hereinbe fore described, and these are therefore given the same reference-figures, the nut in this instance having its bearing on the swinging arm 65 instead of directly on the frame. By means of the swingingarms 65 65 this presserbar can be swung upwardly and outwardly, when desired, to provide convenient access to the burnisher for covering. The rollers 45 45,

located over the cylinders, are independent of any gearing and are merely idle pressurerollers. For the purpose of protection the worm-wheels 27 27 and the pinions 26 26 are each inclosed in a case 27'. The bolts 49 49 are constructed hollow to provide means for introducing alubricant therethrough onto the j ournal-bearings beneath. In constructing the frame A the lower part of it is cast solid and the upper portion of it is bolted to the base, as shown in Fig. 1.

What we claim as new, and desire to secure by Letters Patent, is

1. In a polishing-machine, a laterally sliding block 25 and a vertically-moving j our:

nal-supporting block 18, in combination with ways on the frame, one of which ways is rigid to the frame and the other of which is secured movably on the frame and is adjustable toward and from the supported block 18 by means of beveled bolts 22 22, passing movably through the frame and secured adjustably therein by nuts turning thereon on the outside of the frame, substantially as described.

2. In a polishing-machine, avertically-moving journal-supporting block 18, sliding in ways on the frame, in combination with a block 25, movable horizontally in ways on the block 18, and an eccentric-shaft having its journal-bearings in the frame and passing through and rotating against the block 25, whereby the block 18 is raised and lowered, substantially as described.

3. In a polishing-machine, a shaft 23, the body of which is eccentric to its journals, and block 25, movable laterally on vertically-movin g block 18, in combination with levers 24 24, pivoted at one end on the frame, in which levers the shaft has its journal-bearings, a bolt 31, passing through slot 30 in the lever and turning into the frame, whereby the free end of the lever is held movably to the frame, and bolts 32 and 34, one below and the other above the free end of the lever turning through brackets on the frame against the lower and upper edges of the lever, respectively, substantially as described.

4. In apolishing-machine, the combination, with a flat-topped horizontally rciprocating polisher, of a vertically-movable frame 11,in which the polisher is supported, a shaft 23, provided with eccentrics, which bear against and are adapted by the rocking of the shaft to raise and lower the frame 11, swinging arms 24 24, pivoted at one end on the frame of the machine, in which swinging arms the shaft 23' is journaled, and means, substantially as described, for adjusting the swinging arms up to their work, as set forth.

tures in presence of two witnesses.

JOSEPH B. BENNETT. ANSON P. BOARDMAN.

Witnesses:

O. B. SKINNER, E. C. BEYNOM. 

